As for GR [1]}, [2]} and ECG [3]}, in EQG relativistic images are produced after the light winds around the black hole. For these images to be produced the light must pass the black hole very closely. Consider the first order relativistic image. The closest approach of the light is \(\sim 1.55 \, r_+\) , which is very close to the radius of the photon sphere, \(r_{ps}=1.5 \, r_+\) , where the shadow is produced. The light must get closer and closer to the photon sphere to produce higher and higher order relativistic images.
